The chewing mouthpart is the most common.

咀嚼是最常见的一种类型。

Another important risk factor is tobacco in the form of cigarette, shisha, or even chewing tobacco.

另一个重要的风险因素是烟、水烟甚至咀嚼烟草。

The juvenile stages of some insects, for example, have completely different kinds of mouths than their adult versions, like caterpillars, which use chewing mouthparts to devour leaves before metamorphosing into butterflies and moths with siphoning mouthparts.

例如许多昆虫的幼虫时期有成年时期完全不同的类型，比如毛虫在变成蝴蝶飞蛾之前会用咀嚼来吞食叶子，而蝴蝶飞蛾则是虹吸。